Hi,
On 2020/3/2 19:54, Jonathan Cameron wrote:
On Mon, 2 Mar 2020 14:15:14 +0800
Zaibo Xu <xuzaibo@xxxxxxxxxx> wrote:
From: liulongfang <liulongfang@xxxxxxxxxx>
In order to improve performance of small packets (<512Bytes)
in SMMU translation scenario,We need to identify the type of IOMMU
in the SEC probe to process small packets by a different method.
Signed-off-by: liulongfang <liulongfang@xxxxxxxxxx>
Reviewed-by: Zaibo Xu <xuzaibo@xxxxxxxxxx>
This looks like what we ended up with for the SECv1 driver.
Yes.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Okay
.
---
drivers/crypto/hisilicon/sec2/sec.h | 1 +
drivers/crypto/hisilicon/sec2/sec_main.c | 19 +++++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/drivers/crypto/hisilicon/sec2/sec.h b/drivers/crypto/hisilicon/sec2/sec.h
index 13e2d8d..eab0d22 100644
--- a/drivers/crypto/hisilicon/sec2/sec.h
+++ b/drivers/crypto/hisilicon/sec2/sec.h
@@ -165,6 +165,7 @@ struct sec_dev {
struct list_head list;
struct sec_debug debug;
u32 ctx_q_num;
+ bool iommu_used;
u32 num_vfs;
unsigned long status;
};
diff --git a/drivers/crypto/hisilicon/sec2/sec_main.c b/drivers/crypto/hisilicon/sec2/sec_main.c
index ebafc1c..6466d90 100644
--- a/drivers/crypto/hisilicon/sec2/sec_main.c
+++ b/drivers/crypto/hisilicon/sec2/sec_main.c
@@ -7,6 +7,7 @@
#include <linux/debugfs.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/iommu.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
@@ -826,6 +827,23 @@ static void sec_probe_uninit(struct hisi_qm *qm)
destroy_workqueue(qm->wq);
}
+static void sec_iommu_used_check(struct sec_dev *sec)
+{
+ struct iommu_domain *domain;
+ struct device *dev = &sec->qm.pdev->dev;
+
+ domain = iommu_get_domain_for_dev(dev);
+
+ /* Check if iommu is used */
+ sec->iommu_used = false;
+ if (domain) {
+ if (domain->type & __IOMMU_DOMAIN_PAGING)
+ sec->iommu_used = true;
+ dev_info(dev, "SMMU Opened, the iommu type = %u\n",
+ domain->type);
+ }
+}
+
static int sec_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct sec_dev *sec;
@@ -839,6 +857,7 @@ static int sec_probe(struct pci_dev *pdev, const struct pci_device_id *id)
pci_set_drvdata(pdev, sec);
sec->ctx_q_num = ctx_q_num;
+ sec_iommu_used_check(sec);
qm = &sec->qm;
.
